521161074 has 32 divisors (see below), whose sum is σ = 1323584640. Its totient is φ = 148903056.

The previous prime is 521161073. The next prime is 521161079. The reversal of 521161074 is 470161125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (521161073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688989 + ... + 689744.

It is an arithmetic number, because the mean of its divisors is an integer number (41362020).

Almost surely, 2^521161074 is an apocalyptic number.

521161074 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

521161074 is an abundant number, since it is smaller than the sum of its proper divisors (802423566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521161074 is a wasteful number, since it uses less digits than its factorization.

521161074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378751 (or 1378745 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 521161074 is about 22828.9525383886. The cubic root of 521161074 is about 804.7432145235.

The spelling of 521161074 in words is "five hundred twenty-one million, one hundred sixty-one thousand, seventy-four".